I have a Triple XXX 212 Combo but for this discussion, it is probably irrelevant.
Power tubes: Previous owner installed two Groove Tube EL34s and two JJ E34L (Not a typo, they’re actually labeled E34L, not EL34…) Anyway, the two GTs are side-by-side at one end and the two JJs are at the other end. Now, I don’t know if brand mixing is acceptable but if so, shouldn’t the pairs be installed either on the inside or outside? Does it matter?
Also, the bias test points measure 38.7 VDC in Stand by, 39.4 VDC in On, with all controls set at 0. Yes, the Bias Switch was set for EL34. With the recent discussion on setting bias by ear, I don’t trust myself to do this and I’d rather use my multimeter, at least from a starting point. I’m guessing that ~ 39 VDC is a little low? Please let me know. The Clean channel on this amp is great. Clean and Ultra = "meh" to my ears.
Thanks.
Yet another tube question
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Re: Yet another tube question
Great Gooogeley Mooogeley (Term By Frank Zappa)....
Time to startover and recommend matched quad set.
Believe EL34L are different spec from standard EL34
AND
Pairs are as you are thinking XOOX ----> outside and inside.
Time to startover and recommend matched quad set.
Believe EL34L are different spec from standard EL34
AND
Pairs are as you are thinking XOOX ----> outside and inside.
PAF Classic Series Tube Kit.......Created By Classic30inCincy
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Re: Yet another tube question
Right,
They are currently XXOO. I think they should be XOOX or OXXO. Unless the E34Ls don't belong...
They are currently XXOO. I think they should be XOOX or OXXO. Unless the E34Ls don't belong...
Classic30inCincy wrote:Great Gooogeley Mooogeley (Term By Frank Zappa)....
Time to startover and recommend matched quad set.
Believe EL34L are different spec from standard EL34
AND
Pairs are as you are thinking XOOX ----> outside and inside.
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Re: Yet another tube question
Don't mix the two would be my gut feeling.
Maybe you should call Tube Depot, Doug's Tubes, or The Tube Store regarding difference in spec standard EL34 versus EL34L.
Maybe you should call Tube Depot, Doug's Tubes, or The Tube Store regarding difference in spec standard EL34 versus EL34L.
PAF Classic Series Tube Kit.......Created By Classic30inCincy
Majic Mojo Tradename..........Created By Classic30inCincy
Graduate Of Joe Friday / Dragnet School Of Correspondence
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Re: Yet another tube question
Will do. Would like to go back and try 6L6s as originally delivered.
Classic30inCincy wrote:Don't mix the two would be my gut feeling.
Maybe you should call Tube Depot, Doug's Tubes, or The Tube Store regarding difference in spec standard EL34 versus EL34L.
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Re: Yet another tube question
Good price on matched Quad Set Sovtek 6L6WXT+ @ Tube Depot
Power tubes I prefer in ULTRA 60
Power tubes I prefer in ULTRA 60
PAF Classic Series Tube Kit.......Created By Classic30inCincy
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Re: Yet another tube question
I second the 6l6wxt+ recommendation.
If the different tubes were positioned in their proper pairs I'd say it couldn't hurt anything, but I may be wrong. I'd asked peavey about this for my ultra plus since I usually use it in half power mode. If the same applies to this amp it would be fine.
If the different tubes were positioned in their proper pairs I'd say it couldn't hurt anything, but I may be wrong. I'd asked peavey about this for my ultra plus since I usually use it in half power mode. If the same applies to this amp it would be fine.
ultra plus
xxl head
vtm 60
412 ms
past -
bastardized 410 cab
rock master preamp
supreme 160
valveking royal 8
revolution head
vtm 120
xxl head
vtm 60
412 ms
past -
bastardized 410 cab
rock master preamp
supreme 160
valveking royal 8
revolution head
vtm 120
Re: Yet another tube question
L's stands for extended lows. Willing to be the GT's are rebranded JJ EL34Ls if the bottle size and plate structure are identical. You should be fine. I like the grit of an EL34. I say stick with them if there are no bass or volume issues.Neo Fender wrote:Right,
They are currently XXOO. I think they should be XOOX or OXXO. Unless the E34Ls don't belong...
Classic30inCincy wrote:Great Gooogeley Mooogeley (Term By Frank Zappa)....
Time to startover and recommend matched quad set.
Believe EL34L are different spec from standard EL34
AND
Pairs are as you are thinking XOOX ----> outside and inside.
Peavey Amps: VTM 120, VTM 60 EL34 moddified, BRAVO Peavey Cabs: (2) 5150 Straight
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Re: Yet another tube question
Good Point......
Groove Tubes can be "GT Private Label" JJ's.
Same JJ tube with different name and # assigned By GT.
Groove Tubes can be "GT Private Label" JJ's.
Same JJ tube with different name and # assigned By GT.
PAF Classic Series Tube Kit.......Created By Classic30inCincy
Majic Mojo Tradename..........Created By Classic30inCincy
Graduate Of Joe Friday / Dragnet School Of Correspondence
Doctorate Degree Diplomacy From Royal Order Possum Lodge